At 12:36 PM 5/22/2011, you wrote:
>What you are proposing is essentially inertial navigation.  Look up that
>term to see why that's a completely unworkable idea in this context.

I guess one could interpret GPS data to get some estimate of power & work,
but it would be highly dependent on the accuracy of drag vs. velocity
and mass estimates. Still, it could be essentially free if you have the
GPS already.

--=20
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